<template>
    <div class="cmt-containter">
        <h3>发表评论</h3>
        <hr>
        <textarea placeholder="请输入bb的内容" maxlength="120" v-model="msg"></textarea>
        <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
        <div class="cms-list">
            <div class="cms-item" v-for="(item,i) in comments" :key="item.id">
                <div class="cms-title">
                    第{{i+1}}楼 &nbsp;&nbsp;用户:{{item.user_name}}&nbsp;&nbsp;发表时间:{{item.add_time | dataFomart  }}
                </div>
                <div class="cms-body">
                    {{item.content==='undefined'?'用户很懒什么都没说':item.content}}
                </div>
            </div>
        </div>
        <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button> 
    </div>
</template>

<script>
import { Toast } from "mint-ui";
export default {
  data() {
    return {
      pageIndex: 1, //默认第一页
      comments: [], //所有评论
      msg: "",
      cmt: []
    };
  },
  created() {
    this.getComment();
  },
  methods: {
    getComment() {
      //获取评论
      this.$http
        .get("api/getcomments/" + this.id + "?pageindex=" + this.pageIndex)
        .then(result => {
          if (result.body.status === 0) {
            // this.comments = result.body.message;
            //点击获取更多 不能覆盖原有评论 所以拼接数组
            this.comments = this.comments.concat(result.body.message);
          } else {
            Toast("获取评论失败");
          }
        });
    },
    getMore() {
      //加载更多
      this.pageindex++;
      this.getComment();
    },
    postComment() {
      //发表评论校验是否为空
      if (this.msg.trim().length === 0) {
        return Toast("评论不能为空");
      }
      this.$http
        //post 请求 三个参数,url,{post对象},emulateJSON = true
        .post("api/postcomment/" + this.$route.params.id, {
          content: this.msg.trim()
        })
        .then(result => {
          if (result.body.status === 0) {
            //拼接评论对象
            var cmt = {
              user_name: "匿名用户",
              add_time: Date.now(),
              content: this.msg.trim()
            };
            this.comments.unshift(cmt);
            this.msg = "";
          } else {
            Toast("获取评论失败");
          }
        });
    }
  },
  props: ["id"]
};
</script>

<style lang="sass" scoped>
.cmt-containter{
    h3{
        font-size:18px;
    }
    textarea{
        font-size:14px;
        height:80px;
        margin:0;
    }
    .cms-list{
        margin:5px 0;
        .cms-item{
            font-size:13px;
            .cms-title{
                line-height:35px;
                background-color:#ccc;
                
            }
            .cms-body{
                text-indent:2em;
            }
        }
    }
}
</style>
